For the record we love Horrible Histories in this house, though if this game was your first experience of HH you'd be put off.
The aim is to get your gladiator/slave out of the colliseum in Rome and home to one of 5 lands (Persia, Gaul, Africa, Britannia & Germania). Some are further from the colliseum than others so for example nobody chooses to go home to Africa in our house, we all go to Persia or Gaul! The board is badly designed with the spaces being circular and very faint against the HH illustration, and the pieces oval (!). There is no set path around the board, you can pretty much go anywhere so long as the circles touch which leads to arguments with 7 yr olds and their daddies. There are a few item spaces to pick up specific things like rope, key, water etc. there are also corresponding spaces to lose those items, but precious few opportunities to use the items you have collected.
This COULD have been a really good game but it is so easy to play without having to take/use any of the cards and to avoid dangers that it's almost pointless. No need to do anything other than roll the dice and move.
(Not wanting to ditch this game tho i added walls that players can't cross, walls they can cross only if they have certain items, more chances to pick up Fate or Resource cards, multiple areas to start from, and allocation of home country to reach by throwing a dice (all done with coloured stickers lol). Made it more interesting).
So unless you are going to modify this game i certainly don't recommend wasting the money.
Terry Deary we are disappointed!